Home / 3,429.68-5,145.28-1,121.04

Finding the Fourth Proportional to 3,429.68, 5,145.28 and 1,121.04

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Solution

The fourth proportional to 3,429.68, 5,145.28 and 1,121.04 is: 1,681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.68 : 5,145.28 = 1,121.04 : x
  2. Step 2: Convert to fraction form
    3,429.68/5,145.28 = 1,121.04/x
  3. Step 3: Cross multiply
    3,429.68x = 5,145.28 × 1,121.04
  4. Step 4: Simplify right side
    3,429.68x = 5,768,064.69
  5. Step 5: Solve for x
    x = 5,768,064.69/3,429.68
  6. Step 6: Final answer
    x = 1,681.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.